A board is folded over the foundation, before it is impregnated with bitumen. These boards should have a width of at least one hundred and fifty millimeters and a thickness of fifty millimeters, then they put a bone of salary on top of it, which is protered from below, and then, still adjusted, all the remaining ones. In adjacent crowns, the logs are laid down in the antagonistic sides. Do not forget to check and, if necessary, correct the verticality of all angles, as well as the horizontalness of all the stacked crowns.
How to fasten the crowns: sequence of actions
